Check the wiring for loose, overheated connections. Also check all of the ground points for clean tight connections. Make sure nothing is melting in the fuse box too. It could be just the normal cycling of the fans. If you don't have a Fanzilla both of the fans will kick on at once and drag down the voltage for a second till the alternator can catch up. You might also notice somethinmg like this if you run the A/C, when it cycles not only does it force the cooling fans on it also puts a direct load on the motor which the idle system corrects. You will notice this more as the engine runs slower, less noticable when moving faster. The only cure is a good battery, good wiring and a Fanzilla. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, Travis Goodwin <tgoodwin@xxxx> wrote: > It sounds like a dance, doesn't it? > > I noticed when I was driving at night this past weekend that occasionally > I'd get a dip in the headlights and interior dash lights. I couldn't see any > dip in the voltage (steady at 14). There was nothing that I could see that > corresponded with the dip (engine surge, etc). > > Anyone else seen this before?